1. Departamento de Química Orgánica Universidad Autónoma de Madrid Campus de Cantoblanco 28049 Madrid Spain
2. IMDEA-Nanociencia Faraday 9, Campus de Cantoblanco 28049 Madrid Spain
3. Scuola Normale Superiore and CSGI Piazza dei Cavalieri 7 56126 Pisa Italy
4. Istituto Nazionale di Fisica Nucleare Largo Pontecorvo 3 56100 Pisa Italy
5. Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander-Universität Erlangen-Nürnberg Egerlandstr. 3 91058 Erlangen Germany
6. Institute for Advanced Research in Chemical Sciences (IAdChem) Universidad Autónoma de Madrid 28049 Madrid Spain